Which to use
“CEI” is an abbrev and “cos” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #29,625
- “CEI” frequency rank
- #27,810
- “cos” frequency rank
- 57435
- confusion score
Side-by-Side Comparison
| Feature | CEI | cos |
|---|---|---|
| Definition | Communauté des États Indépendants (português: Comunidade dos Estados Independentes, CEI) | qualquer coisa |
Letter map: CEI vs cos
Shared letters muted; letters that set CEI and cos apart highlighted. Shared run: 1. CEI (CVV) and cos (CVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Role in the sentence - CEI and cos
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: CEI is anabbrev and cosapronoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 57435, derived from the frequency rank of both members and their visual similarity.
CEI is recorded at frequency rank #29,625, classified as anabbrev, pronounced /se.ø.i/. cos is at rank #27,810, tagged as apron.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 57435, this pair ranks #9,337 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of CEI vs cos
Shared letters: c. Private to "CEI": ei. Private to "cos": os.
"CEI" · 3 letters · shape CVV · "cos" · 3 letters · shape CVC
Frequently Asked Questions
Can "CEI" and "cos" be used interchangeably?
Frequency check: "CEI" vs "cos" - which ranks higher?
After this comparison
You've compared "CEI" and "cos". Here's where to go from here.
- Full dictionary entry for "CEI" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "cos" - compare definitions side by side with the headword page. Word entry
- This pair ranks #9,337 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "CEI" and "cos" also get mixed up with nearby pairs, the highest-scored neighbour is "CEI vs coin". Nearby pair
Confusion rank #9,337 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.